Federal health officials have suppressed studies on vaccine safety and effectiveness, blocked academic presentations, and halted research using certain keywords, prompting doctors and scientists to warn that crucial medical information is being kept from the public.
The FDA reportedly quashed studies examining vaccines for shingles and Covid before they could be published. The CDC's acting director pulled a study on Covid booster effectiveness from publication at the last minute. The NIH has refused to fund or approve research using terms like "hesitancy" and "misinformation." Together, these actions are raising alarms about government control over scientific communication and public health information.
"The science and the basis of why we were even doing these studies has been sort of lost in the mist," said Michelle Barron, an infectious disease professor at the University of Colorado School of Medicine and co-author on one of the blocked Covid vaccine studies. "It's incredibly important to recognize that Covid shots are still important. Flu shots are important. Measles shots are important."
The restrictions extend beyond federal employees to private researchers presenting at credentialed conferences. When Elias Kass, a Seattle-based naturopathic physician and vaccine advocate, submitted slides for a CDC-certified continuing education conference in March, organizers told him a CDC representative had flagged two words: "equity" and "a pregnant person." The organizer said Kass would be barred from presenting unless he changed them.
Kass was told the changes were required under recent executive orders on diversity, equity, and inclusion. He modified the slides but pushed back. "When you think about how unimportant and little I am, and the fact that they still were able to reach me to tell me to change my slides, it was shocking," Kass said. "It is saying that the executive order is the end of the story. It gets to dictate what words we use. And that's just censorship."
The most visible case involves a booster effectiveness study. Jay Bhattacharya, the acting director of the CDC, blocked publication of research showing that the latest Covid boosters prevent 50% of emergency room visits and 55% of urgent-care visits among adults. Bhattacharya said the study had methodological flaws, but leaked copies reviewed by independent experts show the design is standard for real-world vaccine research.
"This is a very standard methodology. It should not have been considered controversial," Barron said. Jeremy Faust, an emergency physician at Brigham and Women's Hospital and editor of Inside Medicine, agreed. "It is a run-of-the-mill standard-issue paper, and the intervention says more about his political views and agenda than it does about the science."
Faust noted that the study went through normal CDC peer review and was approved by the editor-in-chief of the CDC's flagship publication, the Morbidity and Mortality Weekly Report. The acting director's decision to intervene in such a routine matter breaks protocol. "The top administrator of the CDC should only intervene in extraordinary circumstances, and this is not an extraordinary paper," Faust said.
The suppression has real consequences for public health. Booster uptake has dropped significantly, and doctors point to this confusion as a contributing factor. "People should be talking about it," Barron said. "Unfortunately, there's so much other stuff that gets discussed that we kind of forget that. External controversies are creating noise that drowns out the science."
Some medical professionals worry these restrictions signal broader moves against routine vaccines. "I think that this HHS is slowly moving against seasonal vaccines generally," Faust said, pointing to the presence of Robert F. Kennedy Jr. as health secretary and other officials skeptical of flu, Covid, and RSV vaccines. An HHS spokesperson rejected the claim as speculative.
The pattern troubles scientists because it erodes the trust required for public health messaging. "It makes people skeptical about any future evidence," Faust said. Allowing the public access to vaccine data is essential for informed decision-making, Barron emphasized. "But you have to have access to it. If you have zero access, then you're not even allowed to make that decision."
Author James Rodriguez: "Blocking routine vaccine research and scrubbing presentation slides of words like 'equity' isn't prudent policy, it's institutional decay that will take years to repair."
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